function Person(name,age){
    this.name = name;
    this.age = age;
    this.sayName = function(){
        console.log(this.name)
    };
}
////
var personA = new Person("ZhangSan","18")
personA.sayName()

console.log(personA instanceof Person)
// console.log(personA)
console.log(Person)
console.log('小乌龟提交方式')
